Slotting machine



Nov. 18,1924- A 1,516,186

w.-.l.l HAGMAN ET AL sLoTTING MACHINEv Fivled sept. 1s, 1921 '.4 sheets-sheet 1 Nov. 18, 1924. 1,516,186 W. J. HAGMAN `ET AL SLOTTING MACHINE Filed sept.

1s. 1 921 4 sheets-sheet 2 '35% M C was Hummm NOV. 1 8 y l w. .J. HAG'MAN ET AL sLUEIING MACHINE Fil'ed Sept.

4 Sheets-Sheet. 3

Nov. 18, 1924- w, J. HAGMAN ET AL ,ag/rama Patented Nov. 18, 1924.

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FTE?

WILLIAM J. HAGE/IAN AND EDWARD H. WRAY, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNORS T0 NILES-BEMENT-EOND COIVIPANY, OF NEW YORK, N. Y., A CORDOBA,-

TION OF NEW JERSEY.

SLOTTING MACHINE.

Application filed September 16, 1921. Serial No. 501,131.

To all whom. it may Concern.'

Be it known that we, WILLIAM J. HAGMAN and EDWARD H. VRAY, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Slotting Machines, of which the following is a specification.

This invention relates to slott-ing machines and particularly to an improved slotting machine of the type commonly called locomotive frame slotters. Such a machine is illustrated in our Patent No. 964,421 dated July 12, 1910. A machine of this type broadly comprises a bed along which is slidable one or a plurality of heads spanning the bed, each head comprising a cross rail on which is mounted for transverse sliding movement a tool supporting saddle. Means is provided for traversing and synchronously feeding the head and saddle on their respective guides. It is the primary object of the invention to provide improved means for performing these functions.

lfleretofore the feeding mechanism for the head and saddle have been operated from the 'main power means of the machine. In the improved machine herein disclosed the feeding operation is preferably accomplished from an independent source of power, as the electric feed motor means illustrated in the drawings, motor control means being provided for intermittently operating the motor means to perform the feeding operation.

lt is an object of the invention to provide an improved slotter of this type wherein the head and saddle may be fed in a definite relative ratio from the feed motor means and wherein supplemental means is provided for relatively varying the feeding movements of such elements.

A further and more-specific object of the invention is to provide a head and saddle mechanism of the type stated, a motor for feeding such elements in a constant relative ratio and supplemental mechanism comprising change speed gearing for varying the relative feeding movements of the elements.

V-ith these and other objects in view, our invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawings. In such drawings annexed hereto and forming a part of this specification, we have illustrated certain embodiments of our invention in a locomotive frame slotter but it will be understood that the invention can be otherwise embodied and that the drawings arenot to be construed as defining or limiting the scope ofthe invention, the claims appended to this speciiication being relied upon for that purpose.

Referring to the figures of the drawings:

Figure 1 .is an end elevation partially in section of a frame slot-ter comprising the present invention, such view` being taken approximately on line 1 1 of Fig. 2.

Fig. 2 is a sectional plan view thereof, taken approximately on line 2 2 of Fig. 3.

Fig. 3 is a detail sectional view taken approximately on line of Fig. 2, certain change speed gearing thereof being shown in dot and dash lines.

Fig. l is a vertical sectional view taken approximately on line 4 4 of Fig. 2, certain parts being shown in elevation.

Fig 5 is a diagrammatic view illustrating an electric control system for the tool feeding and traversing mechanism, such mechanism comprising a modified form of our invention.

Referring to Figs. 1 to d of the drawings, 1 indicates the main frame or bed of the machine which is ordinarily relatively long. Horizontal guideways 2 are provided at opposite sides of the bed for receiving the tool heads or carriages 3. ln the drawings, we

have illustrated but one such head although it will be understood that one or a plurality of such heads, disclosed in our aforesaid patent, may be provided. This head comprises two uprights el resting on the guideways and integrally connected at their4 upper ends to provide a support for an angularly adjustable member The member 5 provides a cross rail 6 on which is slidably mounted a tool supporting saddle 7. rlhe member with the cross rail G thereon is slightly adjustable about vertical axis, bolt and slot connections 8' being provided between the head 3 and member 5 for permittinglsuch adjustment and for securing the member in its adjusted positions. A cutter bar 9 is mounted .for vertical reciprocation lil The further operation of the pilot switch on the motor whereby the latter operates the tool feeding mechanism is hereinafter described. Such operatic-n is also fully disclosed in the aforesaid Patent No. 1,342,915.

As illustrated in Fig 1, the said means includes two pivoted elements 50a each normally held in operative position by means of a spring 50h. The rod 53 connects an arm 50C of the oscillating element 50 to a crank arm 49a of the pilot switch 49. A loosely pivot-ed arm 49b and a spring 49C are provided in connectionv with the arm 49a for fully completing the swinging movement of the switch arm in both directions. As illustrated in Fig. l, the tool bar 9 is moving upwardly. The dog 52 will engage the upper element 5()a and rock the means 50 clockwise. Such movement is transmitted to the pilot switch and the movement of the same to its opposite position is completed by means of the spring 49C. The movement of the tool bar is thereby reversed. Upon downward movement of the bar, the dog 51 engages the lower element 50a and rocks the means 50 anti-clockwise. The pilot switch is thereby moved back to the first said position and the movement of the tool bar again reverses. It should be `understood that the details of this mechanism do not, within, themselves, comprise a part of our invention and therefore such details may be varied as desired.

Referring to Fig. 5 of the drawings, we have illustrated a modification of our invention wherein the feeding movements of the head and the feeding movements of the toolsupporting saddle are electrically controlled by a system such as disclosed in the aJplication to Sven P. Johnson and Harry f arding, Serial No. 441,827 filed February 2nd, 1921. Separate feed motors are provided for feeding the head and the tool-carrying saddle.

A pilot switch 60, which is controlled in any suitable manner by the movement of the cutter bar as, for exampley by the means shown in Fig. 1 and heretofore described, is provided for governing the feeding movements of the head along the bed and the feeding movements o-f the tool carrying saddle along the cross rail. The system shown in Fig. 5, which is controlled by the pilot switch 60, comprises two sub-systems 61 and 62, eac-h of which is similar in construction and operation to the system disclosed in the above mentioned application of Sven P. Johnson and Harry Harding. Inasmuch as the two sub-systems are similar in construction and operation, a detail description of only one system, namely the sub-system 61 for controlling the feeding movement of the head along the bed will be given.

The pilot switch 60, which is electrically connected to a limit switch 63, controls the operation of a control motor 64. The control motor 64 directly operates a control switch 65 which in turn governs the operation of a feed motor 66. A' feed reverse switch 67 is provided for controlling the direction of the feeding operation and a switch 68 is provided for determining at which end of the cutter bar stroke the feeding operation is to be effected. In this regard it may be noted that a feeding operation may be effected at either or both ends of the cutter bar stroke.

A contactor 69, which is governed by the control switch 65, is provided not only for completing an operating circuit through the feed motor 66 but also for completing a dynamic-braking circuit through such motor upon release of the control switch 65. A traverse cont-roller 7 0 is provided for effecting a traverse operation of the cutting tool at any time and independent of the position of any of the parts for effecting a feeding operation may occupy. A relay 71, which is controlled by the pilot switch 63, is provided for completing the energizing circuit of the contactor 69 through the control switch 65. l

The pilot switch 60, which is diagrammatically illustrated in Fig 5 of the drawings, essentially consists of two stationary contact members 72 and 73 and a movable contact member 74. The movable contacting member 74 is provided with an` extended portion 75 which is operated in any suitable manner by the reciprocating movement of the cutter bar. It is assumed the eXtension 75 is operated near the end of the upward movement of the cutter bar to effect engagement between the contact members 73 and 74. YLikewise, near the end of the downward movement of the cutting too-l, the con-v tact member 74 is moved into engagement with the contact member 72. The feeding operation at either end of the cutter bar movement is controlled as hereinafter set forth.

The limit switch 68 comprises a movable contact segment 76 and five stationary contact members 77 to 81, inclusive. The'contact segment 76 is mounted upon a drum (not shown) which is directly operated by the control motor 64, in the manner set forth in the copending application Serial No. 441,827, above referred to. The control motor 64 comprises a field-magnet winding 82 and an armature 83. The fieldmagnet winding 82 is connected across a supply circuit comprising conductors 84 and 85. The armature 83 is connected across the conductors 84 and 85 through the feed reverse switch 67 and the limit switch 63 by means of the pilot switch 60.

The feed reverse switch 67 comprises three movable contact blades 86, 87 and 88 which are respectively connected to stationary contact members 89, 90 and 91. The contact blades 86, 87 and 8S are adapted to engage stationary contact members 92, 93 and 94 when the switch is in position for effecting a -feeding operation in a toiwrard direction and are adapted to engage stationary contact members 95, 90 and 97 when the switch is in position for e; cting a feeding opn eration in ay reverse direction.

The feed motor 06, which etiects operation of the head along the bed, comprise. a. field-magnet winding 98 and an armature 99. The contactor 69 comprises an energizing coil 100 and two switch members 101 and 102. rthe switch member 101 serves to con'iplete an energizing circ-uit t'or the feed motor 0G upon operation or" the contactor and the switch member 102 serves to complete a dynamic-braking circuit upon release of the contactor. A resistor 103 is provided in the dynamic-bralf:ing circuit for the feed motor.

rllhe switch 08 comprises two independently movable switch blades 104 and 105 and two stationary contact members 106 and 107. rlilhe switch 08 serves to etiect feeding operation at either or both ends ot the movement of the cutter bar. lwhen the switch blade 105 engages the contact member 107, a feeding operation is eii'ected at the end ot' the forward movement ot the cutter bar, and when the switch blade 104 is in engagement with the stationaiwY contact member 10G, a feeding operation is effected at the end ot' the downward movement ot the cut-V (er bar. rl`he relay 71 comprises an energizing coil 108, which is connected across the supply conductors 84 and 85 by means ot the pi-lot switch 60. A switch arm 109 is operated by the energizing coil 108 to bridge stationary contact members 110. rhe relay 71 serves to complete a circuit through the control switch 65 and the energizing coil 100 ot the contactor 69. A resist-or 111 provided for limiting the speed of the feed motor under certain conditions as will hereinafter be set forth.

The traverse controller comprises three contact segments 112, 113 and 114, which are mounted on any suitable drum 115. The drum is operated by any suitable handle. Stationary contact members 116 to 123, inclusive, are provided for engagement with the contact segments 112, 113 and 114 acs cording to the operative position ot the controller. The controller is shown in the ott' position, and, in such position the contact segment 114 engages the contact members 121 and 123 for completing a dynamic-bravi;- ing circuit through the feed motor 66. rEhe contactsegment 112 bridges the stationary contact members 116 and 117 for connecting various parts of the system to the supply conductor 84 to effect feeding operations.

The control switch 65 comprises a stationary contact member 124 and a movable contact member 125. The. construction of the switch and the parts for operating it are described in detail in the copending application Serial No. 441,827, and a further descrilition of such parts in this application is deemed unnecessary. However, it may be stated that two cam members are operated by the control motor for respectively closing and oiieuing the control switch. rlfhe rela.- tive angular position ot such cam members determines the time during which the controi switch is maintained in closed position. lr/ ioreovcig as will be set forth hereinafter, the time during which the control switch remains closed determines the length ot operation et the ifeed motor and accordingly the length or the 'feeding operation. The control switch is operated by the control motor sin'iultaneously with the operation ot the limit switch by the motor.

assuming the various parts of the subsystems 01 to be in the position shown in 10g. 5 ot' the drawings and the switch blade 105 of toe switch G8 to be in engagement with the stationary contact member 107, the fauci-ation ot the control system will be de scribed. `Upon completion of the upward movement of the cutter bar, the contacta member 74 ot the pilot switch 00 is moved into en o ment with the stationary contact member 7 `for con'ipleting a circuit 'trom the supply comli'ictors 84 and 85 to eilect a feeding operation of the head along the bed ot the machine. @ne circuit, which is compieted through the` pilot switch 60, extends from the supply conductor vthrough the contact members 74 and 73 of the pilot svaf'itch, contact members 77 and 80, which are bridged by the Contact segment 70 ot the limit switch 63, the energizing coil 108 ot the relay 71, armature 83 of the cont-rol motor, contact members 92 and 89, which are bridged by the switch blade 86, and the contact members 116 and 117, which are bridged by the contact segment 112, to the supply conductor 84. rThe completion or' the above circuit effects operation not only ot the relay 71 but also of the control motor 64. Upon operation of the control motor 64, the control switch 65 is operated to etiect engagement between the contact members 124 and 125. Upon engagement between the Contact members 124 and 125, a circuit is completed which extends from the supply conductor S5 through the contact members 74 and 73 of the pilot switch 60, Contact members 77 and 81, which are bridged by A I the contact segment 70 of the limit switch 0S, contact member 107, the switch blade 105 of the switch 08, control switch 65, contact members 110, which are bridged by the switch arm 109, energizing coil 100 of the contacter 09, contact members 92 and 89, which are bridged by the switch blade 86 and the contact members 116 and 117, which are bridged by the contact segment 112, to the supply conductor 84.

Thereupon the contactor 69 is operated for completing a circuit through the feed motor 66. The circuit through the feed contact segment 112, to the supply conduc-v tor 84. Thereupon the motor 66 is operated to effect a feeding operation of the head along the bed of the machine.

At a predetermined time the control switch 65 is opened by the control motor 64 to limit the feeding operation. TJpon opening of the control switch 65, the circuit of the energizing coil 100 of the contactor 69 is opened to release such contacter. The circuit through the feed motor 66 is broken and a dynamic-braking circuit is completed which extends from one terminal of the armature 99 through the switch member 102, resistor 103, and contact members 121 and 123, which are bridged by thev contact segment 114, to the other terminal of the armature 99. The dynamic-braking circuit effects an efficient and quick stopping of the feed motor 66 to limit the feeding operation.

The contact segment 76 of the limit switch 63 is operated by the control motor 64 to disengage the contact members 77 and 81 and to engage the contact members 79 and 78. The limit switch prepares the system for effecting a feeding operation at the end of the downward movement of the cutter bar. Accordingly, if the blade 104 of the switch 68 is moved into engagement with the Contact member 106, a feeding operation of the motor 66 will take place at the end of the downward movement of the cutter bar. The feed motor is operated when the pilot switch effects engagement between the contact members 74 and 72. Inasmuch as the various parts of the system operate at the end of the downward movement of the cutter bar to effect a feeding operation in a manner exactly similar to the operation heretofore set forth for effecting the feeding operation at the end of the upward movement of the cutter bar, a further description thereof is deemed unnecessary. Moreover, a complete description of the system for effecting the feeding operation at either end of the stroke of a reciprocating member is completely disclosed in the copending application Serial No. 441,827.

In case it is desired to effect a traverse operation at any time independent of the position of the apparatus for effecting a feeding operation, the traverse controller is given a rotation either in a clockwise or in a countercloclrwise direction according to the operation desired. If the controller is given a movement of rotation in a clockwise direction, a traverse operation in a reverse direction is effected and if the controller is given a movement of rotation in a counterrloclrwise direction, a traverse operation in a forward direction is effected.

lf the controller is given a movement of rotation in a clockwise direction to effect a traverse operation in a reverse direction, the contact terminal 116 is disconnected from the contact segment 112 to open the circuits which are adapted to effect a feeding operation. The dynamic-braking circuit, which extends through the contact members 123 and 121, is opened by reason of the disengagement between the contact member 121 and the contact segment 114. The contact segment 112 engages the contact terminal 122 and the contact segment 113 engages the contact terminals 118 and 119. The portion of the contact segment 112, which is disposed adjacent to the contact terminal 117, extends entirely around the controller drum in order to constantly connect such segment to the supply conductor 84. In such position of the traverse controller 70, a circuit is completed through the feed motor 66, which extends from the supply conductor through the field-magnet winding 98, resistor 111, contact terminals 119 and 118, which are bridged by the contact segment 113, armature 99 of the feed motor 66, and the contact terminals 122 and 117, which are bridged by the Contact segment 112, to the supply conductor 84. In the next position of the controller, the contact segment 113 engages the contact terminal 120 for excluding the resistor 111 from circuit to increase the speed of operation of the feed motor. Thus, the traverse operation is effected to rapidly move the head on the bed in a reverse direction.

When it is desired to effect a traverse operation in a forward direction, the controller 70 is given a movement of rotation in a counterclockwise direction to effect engagement between the contact segment 112 and the contact terminal 118 and also to effect engagement between the contact segment 113 and the contact terminals 122 and 119. The contact terminal 116 is disen-V gaged from the contactsegment 112 and the contact terminal 123 is disengaged from the contact segment 114 for the purpose heretofore set forth. A complete description of the circuits completed through the controller while in the above described position is deemed unnecessary.

The rotation of the feed motor 66 and lUO accordingly the direction in which the head of the machine is fed is controlled by the feed reverse switch G7. rllhcn the switch is in the position shown, the head fed in the forward direction and When thrown to the reverse direction, the head is fed in a reverse direction. The switch 6l' merely controls the direction of current flow through the feed motor 36.

The suie-system which controls the feeding, operation of the tool-srpportino)` saddle, is ope `ated by the pilot motor 60 in exactly the saine manner as the sub-system 61 which controls the feeding; movement ot the head on the bed. rllhe sub-system 62 coinprises a feed motor 126, control motor 12T and a control switch 128 and a limit switch 129 which are opera-ted by the control motor 12'?. A switch 130 is provided for governing; thevdirection of rotation of the feed niotor 126, and a switch 131 is provided for selectively effecting a feeding' operation at either or looth ends of the reciprocating; incrementsof the cutter bar. J1 contacter 132 is providedv for completing` an energizing and a dvnamicebralring circuit through the feed motor 126.l A controller 133 is provided for eiif'ecn inge traverse operation of the feed motor at any time independent of the position of the apparatus for elfecting a feedingv o aeration. A relay 134 is provided similar to the relay 71.

The control motor 127 is governed by the pilot switchl GO to operate the control switch 128 and the liinit switch 129. The control switch 128 operates the contacter accordingly the feed motor 126 to effect a feedingoperation of the tool-supporting saddle, rllhe switches 130 and 131, the relay 134 and the controller operate in the. same manner as like parts in the sub-sjistem'61.

From the above description it is apparent the pilot switch 60 serves to control two feed mot-ors 66 and 126 to effect not only a feet ing operation of the head along the hed lont also to effect a feeding operation of the toolcarrying` saddle on the cross rail. amount of feed effected hy either of the motors 66 and may be varied at vvill by varyingC the cani connection between the control motors and the control switches which govern the feeding` motors. rfhe caro connections between the control motors and the control switches is completely described and, claimed in the copending application Serialalle. 4421,32?, ltiloreovcn?1 it is apparent the feeding; operation may take place at either or both endsof the stroke of the cuttalig-bar.

YWhat Wev claim is:

1. -n a frame slotter, thel combination of a hed, a pair of-spaced horizontal guidetvavs thereon, a tool supper w C head spanning the bed and slidaloly mounted on the guidenite relative ratio respectively, conti :l means for intermittently operatingl the motor means to perform he feeding tion, and supplei'nental ineaiis for rela i' varying,` the feedingi movements of the saddle.

i frame slotter, the combination inflea bed, a pair of spaced horizontal Ways thereon, a tool supporting head spann'4 the bed and slidably mounted on i i guideivays, a horizontal cross rail on llto head over the bed, a tool saddle slidahljf mounted on the cross rail, a cutter ha# nounted for reciprocatioi'i in the saddle, power means for reciprocating the bar,` eiertric inotor means for feeding the head alonl'ij its guidevfays and the saddle along the cross rail in a constant relative ratio respectively, control ineens for intern'iittently operating; the inotor means to perform the feedii operation, and means for varying the said relative ratio.

3. 1n a frame slotter, the combination of a lied, a pair of spaced horizontal guideways extending; along opposite sides thereof, a. tool supporting head spanning` the hed and slidahly mounted on the guider?nys1 a. horizontal cross rail on the head substantielli,7 at right angles to the guideivays, a tool saddle slidahly mounted on the cross rail` :i cutter bar mounted for reciprocation in saddle, porter means for reciprocatiiiej bar, electric motor neans for feedin head along` its guideivays and the A i alongV the cross rail in a constant relativo o respectively, control means for interH tently operating the motor means to perform the feeding operation, suppleiiiertr'il ineans for relatively varyingl the feef'linfl movements of the head and saddle, and. means supplemental to the feeding` .means for continuously7 travereineV the head and saddle in either direction,

e. iii a frame slotter, the combination of :i bed7 a pair of spaced horizontal guifleevi thereon, a tool supporting head span bed ano slidalily mounted on the gi c vrau a horizontalcross rail oo the head over the bed, a tool saddle slidably mounted on the cross rail,` a cutter har mounted for reciprocatioiiron the saddle, power means for recipro eating,` thebar, electric motor means for terinitteiitly feeding the head along its guide- Ways and the saddle along,` the cross rail iu a constant relative ratio respectively and in -i relation to the har reciprocation, control means operated f1 .in the tool har ciprocation for intermittently operating the motor means to perform the feeding operation, and means for varying the said rela tive ratio.

5. In a frame slotter, the combination of a bed, a pair of spaced horizontal guideways thereon, a tool supporting head spanning the bed and slidably mounted on the guideivays, a. horizontal cross rail on the head over the bed, a tool saddle slidably mounted on the cross rail, a cutter bar mounted for reciprocation on the saddle, power means for reciprocating the bar, electric motor means for intermittently feeding the head along its guideivays and the saddle along the cross rail in a constant relative ratio respectively and in timed relation to the bar reciprocation, control means for intermittently operating the motor means to perform the feeding operation, means for varying the said relative ratio, and means supplemental to the feeding means fo-r con tinuously traversing the head and saddle in either direction.

6. in a frame slotter, the combination of a bed, a. pair of spaced horizontal guide- Ways extending along opposite sides thereof, a tool support-ing head spanning the bed and slidably mounted on the guide- Ways, a horizontal cross rail on the head substantially at right angles to the guideways, a tool saddle slidably mounted on the cross rail, a cutter bar mounted for reciprocation on the saddle, power means for reciprocating the bar, a fixed screw extending along each guideway, a rotatable nut on each side of the head threadedly engaging each screw, electric motor means operatively connected with said nuts and with the saddle for feeding the head along its guide- Ways and the saddle along the cross rail in a constant relative ratio respectively, control means for operating the motor means to perform the feeding operation and means supplemental to the feeding means for relatively Varying the feeding movements of the head and saddle.

7. In a frame slotter, the combination of a bed, a pair of spaced horizontal guidevvays thereon, a tool supporting head spanning the bed and slidably mounted on the guide- Ways, a. horizontal cross rail on the head over the bed, a tool saddle slidably mounted on the cross rail, a cutter bar mounted for reciprocation on the saddle, power means for reciprocating the bar, a feed motor for feeding the head along its guideways and the saddle along the cross rail in a definite relative ratio respectively, control means for intermittently operating the motor to perform the feeding operation, and mechanical means supplemental to the feeding means for relatively varying the feeding movements of the head and saddle.

8. In a frame slotter, the combination of a bed, a pair of spaced horizontal guideways thereon, a tool supporting head spanning the bed and slidably mounted on the guideivays a horizontal cross rail on the head over the bed, a tool saddle slidably mount-ed on the cross rail, a cutter bar mounted for reciprocation on the saddle, an electric motor for reciprocating the bar, a feed nictor for feeding the head along its guide- Ways and the saddle along the cross rail in a constant relative ratio respectively, control means for intermittently operating the motor to perform the feeding operation, and gearing supplemental to the said means for relatively varying the feeding movements of the head and saddle.

9. in a fname slotter, the combination of a bed a pair of spaced horizontal guideivays thereon, a tool supporting head spanningthe bed and slidably mounted on the guideways, a horizontal cross rail on the head over the bed, a tool saddle slidably mounted on the cross rail, a cutter bar mounted for reciprocation on the saddle, means for reciprocating the bar, mechanism for feeding the head along its guide Ways, mechanism for feeding the saddle along the cross rail, means for intermittently operating both said mechanisms in a constant relative ratio and in timed relation to the bar reciprocation, and change speed gearing supplemental to one of the said mechanisms for varying the feed imparted by the said mechanism.

l0. In a frame slotter, the combination of a bed, a. pair of spaced horizontal guide ways thereon, a tool supporting head spa-nning the bed and slidably mounted on the guideiv'ays, a horizontal cross rail on the head over the bed, a tool saddle slidably mounted on the cross rail, a cutter bar mounted for reciprocation on the saddle, means for reciprocating the bar, mechanism for feeding the head along its guideways, mechanism for feeding the saddle along the cross rail, means for intermittently operating both said mechanisms in a constant relative ratio and in timed relation to the bar reciprocation, change speed gearing supplemental to one of the said mechanisms for varying the feed imparted by the said mechanisms, and means supplemental to the feeding means for continuously traversing the head and saddle in either direction.

il. in a frame slotter, the combination of a bed, a. pair of spaced horizontal guide- Ways thereon, a tool supporting head spanning the bed and slidably mounted on the guideways, a horizontal cross rail on thehead over the bed, a tool saddle slidably mounted on the cross rail, mechanism for feeding the head along its guideways, mechanism for feeding the saddle along the cross rail, a motor on the head for operating both said mechanisms, control means for intermittently operating the motor to perform the feeding' operation, and change speedy gea-ring supplemental to one of the said mechanisms for Varying the feed imparted by the said mechanism."

l2. In a frameslotter, the combination of a bed, a pair of spaced horizontal guide- Ways thereon, a tool supporting head spannng'the hed and slidably mounted on the guide-Ways, a horizontal Cross rail on the head over the hed, a tool saddle slidahly mounted on the cross rail, a Cutter blar mounted for reoiprooation on the saddle, means for reciprocating' the bar, mechanism for feeding the head along its guideways,

n'ieohanism for feeding the saddle along the cross rail, a motor on the head for oper-air ing l'both said mechanismsy control means operative on the motor for intermittentl;Y feeding the head and saddle in a constant relative. ratio respectively and in timed relation to the bar reciproeation, and change speed gearing supplemental to one of the said mechanisms for varying the feed imn parted by the said mechanism.

n testimony whereof We hereto affix our 25 signatures.

VVILLAM J. HAGMAN. EDVVARD H. VRY. 

